Results 11 to 20 of about 289 (174)

On the use of heated needle probes for measuring snow thermal conductivity

Journal of Glaciology, 2022
Heated needle probes provide the most convenient method to measure snow thermal conductivity. Recent studies have suggested that this method underestimates snow thermal conductivity; however the reasons for this discrepancy have not been elucidated.
Kévin Fourteau, Pascal Hagenmuller, Jacques Roulle, Florent Domine   +3 more
doaj   +1 more source

Ice drilling on Skytrain Ice Rise and Sherman Island, Antarctica

Annals of Glaciology, 2021
To understand the long-term climate and glaciological evolution of the ice sheet in the region bordering the Weddell Sea, the British Antarctic Survey has undertaken a series of successful ice core projects drilling to bedrock on Berkner Island, James ...
Robert Mulvaney, Julius Rix, Scott Polfrey, Mackenzie Grieman, Carlos Martìn, Christoph Nehrbass-Ahles, Isobel Rowell, Rebecca Tuckwell, Eric Wolff   +8 more
doaj   +1 more source

Instruments and Methods: A novel method for obtaining very large ancient air samples from ablating glacial ice for analyses of methane radiocarbon [PDF]

We present techniques for obtaining large (∼100 L STP) samples of ancient air for analysis of ¹⁴C of methane (¹⁴CH₄) and other trace constituents. Paleoatmospheric ¹⁴CH₄ measurements should constrain the fossil fraction of past methane budgets, as well ...
Weiss, Ray F., Petrenko, Vasilii V., Lowe, Dave, Harth, Christina M., Schaefer, Hinrich, Brook, Edward J., Reeh, Niels, Smith, Andrew M., Severinghaus, Jeffrey P., Muhle, Jens, Headly, Melissa   +10 more
core   +6 more sources

Continuous flow analysis methods for sodium, magnesium and calcium detection in the Skytrain ice core

Journal of Glaciology, 2022
Dissolved and particulate sodium, magnesium and calcium are analyzed in ice cores to determine past changes in sea ice extent, terrestrial dust variability and atmospheric aerosol transport efficiency.
Mackenzie M. Grieman, Helene M. Hoffmann, Jack D. Humby, Robert Mulvaney, Christoph Nehrbass-Ahles, Julius Rix, Elizabeth R. Thomas, Rebecca Tuckwell, Eric W. Wolff   +8 more
doaj   +1 more source

Towards the development of an automated electrical self-potential sensor of melt and rainwater flow in snow

Journal of Glaciology, 2022
To understand snow structure and snowmelt timing, information about flows of liquid water within the snowpack is essential. Models can make predictions using explicit representations of physical processes, or through parameterization, but it is difficult
Alex Priestley, Bernd Kulessa, Richard Essery, Yves Lejeune, Erwan Le Gac, Jane Blackford   +5 more
doaj   +1 more source

Bayesian calibration of an avalanche model from autocorrelated measurements along the flow: application to velocities extracted from photogrammetric images

Journal of Glaciology, 2020
Physically-based avalanche propagation models must still be locally calibrated to provide robust predictions, e.g. in long-term forecasting and subsequent risk assessment.
María Belén Heredia, Nicolas Eckert, Clémentine Prieur, Emmanuel Thibert   +3 more
doaj   +1 more source

Antarctic subglacial drilling rig: Part IV. Electrical and electronic control system

Annals of Glaciology, 2021
In many cases, the efficiency and safety of a drilling project depend on the reliability of the electrical and electronic control system, as the process progresses without visual access of the operator.
Nan Zhang, Pavel Talalay, Jingbiao Liu, Xiaopeng Fan, Qingpeng Kong, Haibin Yu, Yunchen Liu, Benkun Liu, Da Gong, Xingchen Li, Wei Wu, Jialin Hong, Mikhail Sysoev   +12 more
doaj   +1 more source

Report of "Workshop on the Glaicological Technology in Polar Regions" [PDF]

, 1995
A workshop on Glaciological Technology in Polar Regions was organized to discuss recent progress in glaciological technology, including observation and analytical methods.
Kokichi Kamiyama
core   +2 more sources

Development of a clean hot water drill to access Subglacial Lake CECs, West Antarctica

Annals of Glaciology, 2021
Recent drilling successes on Rutford Ice Stream in West Antarctica demonstrate the viability of hot water drilling subglacial access holes to depths >2000 m.
Keith Makinson, Paul G. D. Anker, Jonathan Garcés, David J. Goodger, Scott Polfrey, Julius Rix, Alejandro Silva, Andrew M. Smith, José A. Uribe, Rodrigo Zamora   +9 more
doaj   +1 more source

Array processing in cryoseismology: a comparison to network-based approaches at an Antarctic ice stream [PDF]

, 2023
Seismicity at glaciers, ice sheets, and ice shelves provides observational constraint on a number of glaciological processes. Detecting and locating this seismicity, specifically icequakes, is a necessary first step in studying processes such as basal ...
Kufner, Sofia-Katerina, Kendall, J.-Michael, Smith, Andy M., Hudson, Thomas Samuel, Brisbourne, Alex M.   +4 more
core   +1 more source